U.S. patent application number 11/193047 was filed with the patent office on 2007-02-01 for coplanar waveguide fed dual-band slot antenna and method of operature therefore.
Invention is credited to Seong-Youp Suh.
Application Number | 20070024515 11/193047 |
Document ID | / |
Family ID | 37693761 |
Filed Date | 2007-02-01 |
United States Patent
Application |
20070024515 |
Kind Code |
A1 |
Suh; Seong-Youp |
February 1, 2007 |
Coplanar waveguide fed dual-band slot antenna and method of
operature therefore
Abstract
An embodiment of the present invention provides an antenna,
comprising a substrate, a metallic component printed on the
substrate, a main radiating slot etched into the metallic
component, the main radiating slot fed by a coplanar waveguide, and
at least one additional slot etched next to the main radiating
slot. An embodiment of the present invention further provides a
method of manufacturing an antenna, comprising printing a metallic
component on a substrate, etching a main radiating slot into the
metallic component, the main radiating slot fed by a coplanar
waveguide, and etching at least one additional slot in proximity to
the main radiating slot.
Inventors: |
Suh; Seong-Youp; (San Jose,
CA) |
Correspondence
Address: |
BLAKELY SOKOLOFF TAYLOR & ZAFMAN
12400 WILSHIRE BOULEVARD
SEVENTH FLOOR
LOS ANGELES
CA
90025-1030
US
|
Family ID: |
37693761 |
Appl. No.: |
11/193047 |
Filed: |
July 28, 2005 |
Current U.S.
Class: |
343/767 |
Current CPC
Class: |
H01Q 13/10 20130101;
H01Q 21/30 20130101 |
Class at
Publication: |
343/767 |
International
Class: |
H01Q 13/10 20060101
H01Q013/10 |
Claims
1. An antenna, comprising: a substrate; a metallic component
printed on said substrate; a main radiating slot etched into said
metallic component, said main radiating slot fed by a coplanar
waveguide; and at least one additional slot etched next to said
main radiating slot.
2. The antenna of claim 1, wherein the form factor of said slot
antenna enables it to be installed in the lid of a laptop.
3. The antenna of claim 1, wherein said slot antenna is capable of
providing a bi-directional pattern with half-power beam width of
80.degree. for each beam enabling said antenna to have angular
coverage of about 160.degree. in a single element.
4. The antenna of claim 1, wherein said antenna is on the same
printed circuit board of a radio transceiver associated with said
antenna.
5. The antenna of claim 1, further comprising a connector coupling
said coplanar wave guide and a radiating source.
6. A method of manufacturing an antenna, comprising: printing a
metallic component on a substrate; etching a main radiating slot
etched into said metallic component, said main radiating slot fed
by a coplanar waveguide; and etching at least one additional slot
in proximity to said main radiating slot.
7. The method of claim 6, further comprising enabling the form
factor of said slot antenna to be installed in the lid of a laptop
computer.
8. The method claim 6, wherein said slot antenna is capable of
providing bi-directional pattern with half-power beam width of
80.degree. for each beam enabling said antenna to have angular
coverage of about 160.degree. in a single element.
9. The method of claim 6, further comprising printing said antenna
on the same printed circuit board of a radio transceiver associated
with said antenna.
10. The method of claim 1, further comprising integrating a
connector coupling with said coplanar wave guide.
11. A system for communicating in a wireless Local Area Network,
comprising: an access point; a wireless device capable of
communicating with said access point, said wireless device
including an antenna, wherein said antenna comprises: a substrate;
a metallic component printed on said substrate; a main radiating
slot etched into said metallic component, said main radiating slot
fed by a coplanar waveguide; and at least one additional slot
etched next to said main radiating slot.
12. The system of claim 11, wherein the form factor of said slot
antenna enables it to be installed in the lid of a laptop
computer.
13. The system of claim 11, wherein said slot antenna is capable of
providing bi-directional pattern with a half-power beam width of
80.degree. for each beam enabling said antenna to have angular
coverage of about 160.degree. in a single element.
14. The system of claim 11, wherein said antenna is on the same
printed circuit board of a radio transceiver associated with said
antenna.
15. The system of claim 11, further comprising a connector coupling
said coplanar wave guide and a radiating source.
16. The antenna of claim 1, wherein said antenna is capable of dual
band operation.
17. The antenna of claim 16, wherein said dual band is dual-band in
the frequency of 2.4 and 5.5 GHz and capable of operation in said
bands simultaneously.
Description
BACKGROUND
[0001] Wireless local area networks (WLAN) are becoming prevalent
in many environments. To facilitate implementation of WLAN, the
Institute of Electrical and Electronic Engineers (IEEE) has
developed standards and protocols for such networks. These
standards are commonly referred to as the IEEE 802.11 standards
(802.11a, 802.11b, and so forth).
[0002] An 802.11 WLAN network is typically made up of a group of
nodes forming a cell called Basic Service Set (BSS). A node may be
an access point (AP) or a station (STA). There is constant effort
to improve the quality and bandwidth of these wireless networks.
Since RF energy is emitted from and received by an antenna
associated with a transceiver, improvements to antenna technology
are greatly desired. Further, the ability to transmit and receive a
plurality of frequencies is beneficial to WLANs.
[0003] Currently, there are improved antennas such as slot antennas
operating in the dual-band, however, these antennas use a switch in
the middle of the slot to generate a dual-mode and thus cannot
provide concurrent operation in the dual-band.
[0004] Thus, a strong need exists for an improved antenna that is
capable of multiple band operation without a switch in wireless
networks.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The subject matter regarded as the invention is particularly
pointed out and distinctly claimed in the concluding portion of the
specification. The invention, however, both as to organization and
method of operation, together with objects, features, and
advantages thereof, may best be understood by reference to the
following detailed description when read with the accompanying
drawings in which:
[0006] FIG. 1 illustrates the dual-band slot antenna of one
embodiment of the present invention;
[0007] FIG. 2 graphically illustrates the computed return loss
(referenced to 50.OMEGA.) of one embodiment of the present
invention; and
[0008] FIG. 3 depicts a computed radiation pattern at 2.5 GHz of
one embodiment of the present invention.
[0009] It will be appreciated that for simplicity and clarity of
illustration, elements illustrated in the figures have not
necessarily been drawn to scale. For example, the dimensions of
some of the elements are exaggerated relative to other elements for
clarity. Further, where considered appropriate, reference numerals
have been repeated among the figures to indicate corresponding or
analogous elements.
DETAILED DESCRIPTION
[0010] In the following detailed description, numerous specific
details are set forth in order to provide a thorough understanding
of the invention. However, it will be understood by those skilled
in the art that the present invention may be practiced without
these specific details. In other instances, well-known methods,
procedures, components and circuits have not been described in
detail so as not to obscure the present invention.
[0011] An algorithm or process is here, and generally, considered
to be a self-consistent sequence of acts or operations leading to a
desired result. These include physical manipulations of physical
quantities. Usually, though not necessarily, these quantities take
the form of electrical or magnetic signals capable of being stored,
transferred, combined, compared, and otherwise manipulated. It has
proven convenient at times, principally for reasons of common
usage, to refer to these signals as bits, values, elements,
symbols, characters, terms, numbers or the like. It should be
understood, however, that all of these and similar terms are to be
associated with the appropriate physical quantities and are merely
convenient labels applied to these quantities.
[0012] Use of the terms "coupled" and "connected", along with their
derivatives, may be used. It should be understood that these terms
are not intended as synonyms for each other. Rather, in particular
embodiments, "connected" may be used to indicate that two or more
elements are in direct physical or electrical contact with each
other. "Coupled" my be used to indicated that two or more elements
are in either direct or indirect (with other intervening elements
between them) physical or electrical contact with each other,
and/or that the two or more elements co-operate or interact with
each other (e.g. as in a cause and effect relationship).
[0013] It should be understood that embodiments of the present
invention may be used in a variety of applications. Although the
present invention is not limited in this respect, the devices
disclosed herein may be used in many apparatuses such as in the
transmitters and receivers of a radio system. Radio systems
intended to be included within the scope of the present invention
include, by way of example only, cellular radiotelephone
communication systems, satellite communication systems, two-way
radio communication systems, one-way pagers, two-way pagers,
personal communication systems (PCS), personal digital assistants
(PDA's), wireless local area networks (WLAN), personal area
networks (PAN, and the like).
[0014] An embodiment of the present invention provides a new
antenna element for wireless networks, such as but not limited to,
WLAN applications providing dual-band in the frequency of 2.4 and
5.5 GHz simultaneously. The dual-band WLAN antenna may be achieved
by using a plurality, such as by way of example and not limitation,
using two slots made in the copper plate printed on a dielectric
substrate. It is understood that the present invention is not
limited to the metal copper for the plate. A main slot may be fed
by a coplanar waveguide and the second slot may be etched next to
the main radiating slot. The compact form factor of the slot
antenna enables it to be easily installed in the lid of a laptop
computer. The slot antenna may also provide a bi-directional
pattern with half-power beam width of 80.degree. for each beam, so
the antenna may have angular coverage of about 160.degree. in a
single element. Further, the printed coplanar waveguide feed system
enables to print the antenna on the same printed circuit board of
radio transceiver.
[0015] Turning now to the figures, FIG. 1, generally at 100,
illustrates the dual-band slot antenna of one embodiment of the
present invention. Metallic component 110 is shown on substrate 105
with slots 120, 130 and 140 etched therein. Coplanar waveguide 150
feeds the slots 120, 130, and 140 and is connected to an energy
source by connector 115.
[0016] FIG. 2 graphically, at 200, illustrates the computed return
loss (referenced to 50.OMEGA.) of one embodiment of the present
invention in GHZ 210 vs. S parameter magnitude in dB 205.
[0017] FIG. 3 depicts, at 300, a computed radiation pattern at 2.5
GHz of one embodiment of the present invention.
[0018] An embodiment of the present invention further provides a
method of manufacturing an antenna, comprising printing a metallic
component on a substrate, etching a main radiating slot into the
metallic component, the main radiating slot fed by a coplanar
waveguide, and etching at least one additional slot in proximity to
the main radiating slot. This method may provide that the form
factor of the slot antenna may be capable of being installed in the
lid of a laptop computer and may be capable of providing
bi-directional pattern with half-power beam width of 80.degree. for
each beam enabling the antenna to have angular coverage of about
160.degree. in a single element. The method also allows the
potential to print the antenna on the same printed circuit board of
a radio transceiver associated with the antenna and also integrate
a connector coupling with the coplanar wave guide.
[0019] In yet another embodiment of the present invention is
provided a system for communicating in a Wireless Local Area
Network, comprising, an access point, a wireless device capable of
communicating with the access point, the wireless device including
an antenna, wherein the antenna comprises: a substrate; a metallic
component printed on the substrate; a main radiating slot etched
into the metallic component, the main radiating slot fed by a
coplanar waveguide; and at least one additional slot etched next to
the main radiating slot.
[0020] While certain features of the invention have been
illustrated and described herein, many modifications,
substitutions, changes, and equivalents will now occur to those
skilled in the art. It is, therefore, to be understood that the
appended claims are intended to cover all such modifications and
changes as fall within the true spirit of the invention.
* * * * *